Officially speaking, you can take it apart, diagnose the issue and fix it yourself.
A tech would be better obviously as they have service manuals and access to get the parts.
That said, it is entirely possible something just fell into the slot and keeps getting in the way, meaning you might be able to take it out and flip it over then give it a "shaking of a lifetime" with pretty much no chance of making things worse.
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for posts that resolve your issues. Your feedback counts!Joe Arseneau